Flying certain foods around the world may be less environmentally harmful than buying locally, said Terry Leahy, Chief Executive of the world's third biggest retailer Tesco , announcing new research funding.  Concerns are growing that a corporate dash to be seen to be doing something about climate change is causing more harm than good.

"We're seeing a lot of knee jerk responses," Leahy told reporters on Wednesday, announcing Tesco's 25 million pounds funding over five years of a new "Sustainable Consumption Institute" (SCI) at the University of Manchester.

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